52 



ART. 10. K. TKEDA : STUDIES ON THE 



For the calculation of tlie natural vapour pressure curve 

 of the system according to equation (28) we have the following 

 relations : 



— r p \ J- / 



where the unit of pressure is one atmosphere. The results of 

 the calculation are given in the following table. 



TuEBABA found at 50.5° Q = 0.405 and P= 1.5-2, while the 

 calculation gives Q = 0.394 and P=1.65. 



The temperature-composition diagram shown in Fig. 11 is 

 constructed from the preceding table. The data found by 

 TuEBABA are marked with circlets. These are but rough estima- 

 tions with the exception of the datum for 50.5° which, being 

 the mean of a large number of tolerably concordant determinations, 

 must be considered accurate. 



